A model for calculating the nitrogen requirement of cereals.N J Bradbury, A P Whitmore,D S Jenkinson, A Scaifemag(1990)引用 26|浏览6关键词dynamics,availability,nitrogenAI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要